Abstract: Based
on gas dynamics, thermodynamics, fluid dynamics of multiphase
systems and other theories, the dynamic analyses of the particle
flying velocity in a high velocity oxygen fuel spray (HVOF) is
accomplished. The relationships between the flying velocity of a
particle and the flying time or flying length, particle size, hot
gas velocity, pressure or density of the gas are proposed.
Meanwhile , the influences of the velocity and mass rate of flow
of the flame gas of a HVOF gun, and particle size on the
particle flying velocity are discussed in detail . The dynamic
pressure concept is introduced to express the flow capacity of
hot gas of a HVOF gun, and the relationship between the dynamic
pressure of a HVOF gun and the velocity of a particle for
depositing is presented.
Key words: Spray Particle Velocity HVOF
Manuscript received on
January 20, 2000; revised manuscript February 26, 2000
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